<!DOCTYPE html>
<html>

<head>
    <title></title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link href="../bootstrap-5.1.3-dist/css/bootstrap.css" rel="stylesheet">
    <script src="../bootstrap-5.1.3-dist/js/bootstrap.bundle.min.js"></script>
</head>

<body class="container">
    <h3 align="center">定义卡片</h3>
    <div class="container">
        <div class="card">
            <h1 class="card-title">卡片标题</h1>
            <h5 class="card-subtitle text-muted">小标题</h5>
            <div class="card-body">
                <p class="card-text">卡片主体内容</p>
                <a href="#" class="card-link">注册</a>
                <a href="#" class="card-link">登录</a>
            </div>
        </div>
    </div>
</body>

</html>